Uncommon exoplanet 25 EP

HD 217107 b

RA 344.5647° · Dec -2.3954° · exoplanet

Loading sky survey…

🌌 View in 3D star map

Tonight’s visibility

Computing the sky for your location…

Score breakdown

· 4 badges

25 pts · Uncommon

Uncommon 33 pts → Rare

Hot Jupiter +10
Multi-planet system +6
Confirmed exoplanet +5
Gas giant +4

Total score 25

8 more points to reach Rare.

Badges

Confirmed exoplanet · +5
Gas giant · +4
Hot Jupiter · +10
Multi-planet system · +6

Trivia

Could we get there?

Verdict. Hopelessly far for any craft humanity can build today.

Getting there

Aboard Voyager 1. ≈ 1.1 million years at Voyager 1's speed (17 km/s).
Fastest probe ever. ≈ 102.2 thousand years even at the Parker Solar Probe's 192 km/s.
At 10% light speed. ≈ 654 years in a starship at a tenth of light speed.
Distance. 65.4 light-years from Earth.

Look-back time

Look-back time. The light you'd see left around the year 1961.

Saying hello

Say hello. A radio message and its reply would take 131 years round-trip.

Standing on it

A year here. A full year lasts just 7.1 Earth days.

By the numbers

Size. About 13.6× the width of Earth.
Volume. About 2515 Earths could fit inside it.
Mass. Roughly 460× Earth's mass — about 1.4 Jupiters.
Your weight. You'd weigh about 2.5× your Earth weight standing here.
Temperature. Around 833°C — hotter than a self-cleaning oven.

How we found it

Discovery. Found by Lick Observatory using the radial velocity method.

Cosmic context

Crowded system. One of at least 2 planets orbiting its star.

Properties

density gcc: 1
discovery facility: Lick Observatory
discovery method: Radial Velocity
dist ly: 65.4331
eccentricity: 0.1284
eq temp k: 1105.84
insolation: 231.1546
mass earth: 459.5799
name: HD 217107 b
orbital period days: 7.127
radius earth: 13.6
sys num planets: 2

About HD 217107 b

HD 217107 b is an uncommon exoplanet. It lies about 65.4 light-years from Earth, has an equilibrium temperature near 1,106 K, spans roughly 13.6 Earth radii and weighs about 459.58 Earth masses.

One of at least 2 planets orbiting its star.

How to see it

Like any astronomical target, HD 217107 b is best seen from a dark site away from city lights, and when it is above the horizon depends on your latitude and the time of year. The visibility panel above works out tonight's viewing window for your saved location.

Why HD 217107 b is an uncommon exoplanet

HD 217107 b scores 25 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 8 points would lift it into a rarer tier.

That score comes from 4 science badges — Confirmed exoplanet, Gas giant, Hot Jupiter and Multi-planet system — each earned for a real, measurable property of the object. Rarity on Spacedle is never random: the more remarkable an object's astrophysics, the more badges it collects, the higher it scores, and the rarer it ranks.